hoffman



UNITED STATES PATENT OFFICE.

CARL FRIEDRICH XVILHELM DOEHRING AND CARL GUST. HOFFMAN, OF

LEIPSIC, GERMANY.

REGISTERING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 361,678, dated April 26, 1887.

Application filed August 14, 1886. Serial No. 210,883. (No model.)

To all whom it may concern.-

Be it known that we, CARL FRIEDRICH WILHELM DOEHRING and CARL GUSTAV HOFFMAN, both residing at Leipsic, Germany, have invented a new and Improved Begisterin g Apparatus for Electrical Control and Fire- Alarms, of which thefollowing specification is a full, clear, and exact description.

The present arrangements for registering any control or fire-alarms are for small machines generally too expensive. To simplify the same forms the nature of our invention.

The invention consists of the elements of improvement hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a top view of our improved apparatus. Fig. 2 is a side view of the same, partly in section. Fig. 3 is a horizontal section and plan of part of the same at line 14 14, Fig. 4. Fig. 4 is a vertical section of the casing, showing side View of mechanism. Fig. 5 is a side view of the marking apparatus. Fig. 6 shows a side view of the same in a different position. Fig. 7 is a cross-section at line 12 12, Fig. 5. Fig. 8 is a cross-section at line 13 13, Fig. 5.

In a case, A, a usual clock-work is arranged to rotate the dial-paper Z in a, specified time once around. Besides this clock-work a second clock -work, B, is arranged, operating shafts s and 10, arranged in the case, by means of gear-wheels a a a a This clock-work B is connected, through levers 3 and '1 with the armature-lever y of the electro-magnet 4v, so that whenever the armature-lever y is attraeted by the electro-magnet the clock-work will be set in operation to turn the pinion 10 attached to the upper end of the shaft w, once around. At the upper end of the shafts a hub having one tooth, s is attached, acting during its revolution against a lever, t. The other end of this lever it bears against a springlever, u, in contact with the shaft w. This spring-lever a acts upon the shaft 10, so as to keep the pinion w in gear with the teeth of a rod, 12. As soon as the tooth s operates the lever t the latter acts upon the spring-lever a to move the shaft w, and consequently the pinion w, sidewise, thereby bringing the pinion 10 clear of the teeth on the rod 12. Above the case a tube, a, is arranged, having a longitudinal opening on one side and hinged to the center of the dial Z'-. Into this tube a rod, 1/, is fitted and guided, having teeth at one side projecting through the openingin the tube and carrying at its end a writing or marking wheel, o". The other end of the rod 2) is attached to aspring, '0, the end of which is connected to the end of the the tube a, and acts upon the rod 2; to pull the same, together with its markingwheel o inside or away from the dial-paper Z The end of the tube o receives a guide in the casing, and is connected with the armature-lever y.

The operation is as follows: When an alarm is given or the control is to be indicated, the current is passed through the electro-magnet so, in consequence of which the armature-lever y will be attracted and moved downward. By this operation the clock-work B is relieved through the action of rod f and lever 1 when the clock-work will operate, turning thereby the shafts s and w, and as the pinion 20 of shaft w is in gear with the teeth of the rod o, the same, and consequently its marking-wheel o, will be moved over the dial-paper Z". The

tooth s comes then in contact with the lever t, moving the shaft w and pinion 10 clear of the teeth in rod 1), when the action of the spring 1; can move this rod 12, together with its marking-wheel u", again toward the outer periphery of the dial-paper Z". At the same time the current is interrupted the armaturelever y leaves the electromagnet x, and by its upward movement forces the end of the tube 11 downward, so as to bring the marking-wheel 11 upon the surface of the dial-paper Z causing thereby, during this backward motion, the wheel a to make a mark upon the dial-paper Z. By disconnecting the tube from the center of the dial this dial-paper Z can be readily changed whenever required.

Instead of the arrangement of the tooth 8", lever 15, and spring-lever u, the pinion 10* may be made with teeth only on part of its circumference, when during one-half (more or less) of its revolution, the rod '0 will be moved toward the central part of the dial-paper, and as soon as the blank surface of said wheel is reached the spring 1 can operate, as and for the purpose described.

As soon as the current passing through the wheel o", and spring 2), arranged to operate in eleetromagnet w stops, and the armature-lethe manner and for the purpose substantially ver y moves upward, the motion of the clock as described. 15 B will be stopped. In testimony whereof we have signed our 5 WVe claim as our invention names to this specification in the presence of In combination with a dial, Z operated by two subscribing witnesses. a clock-work the electro'magnet w, armatnrea 1, lever 1, clock-work B, connected through legig DOLHMM" ver y and rod 9/ with the armature-lever 3 r0 shafts s and w, pinion w", guiding-tube o, \Vitnesses:

hinged to the center of dial and connected to EDMUND EACH,

the armature-lever '1 toothed rod 12 markin MAX IVIATTHAI. 

